Indexing mechanism for chase plates and printing segments



April 8, 1930- F. H. POEPPELMEIER INDEXING MECHANISM FOR CHASE PLATES AND PRINTING SEGMENTS Filed Oct. 20, 1928 4.. A TTORNEY Patented Apr. 8, 1930 UNITED STATES," PATENT oFFIcE FRANK H. POEPPELMEIER OF DAYTON, OHIO, ASSIGNOR TO THE TYPOGRAPHIC MA- GHINES COMPANY, or DAYTON,

OHIO, A CORPORATION OF OHIO I INDEXING MECHANISM FOR CHASE PLATES AN D PRINTING SEGMENTS Application'filed October 20, 1928. Serial No. 813,777.

This invention relates to new and useful improvements in hand-operated indexing mechanism for chase plates and printing segments.

It is the principal object of the invention to provide for chaseplates andprinting 'seg ments, an indexing mechanism which is simple in construction, efiicient in operation, and which may be producedat very lowcost. 1o Other important and incidental objects will be brought out in the-following specification and particularly set forth in the subjoined claims. a p

In the accompanying drawings illustrat- 15 ing my invention, Figure 1 is a side view of the invention, showing a chase plate in position to be indexed by my hand-operated .mechanism. Figure 2 is a plan View of the same. Figure 3 is an enlargeddetail view 20 of the invention, showing the indexing mechanism at the end of the indexingv stroke. And F igu're' l is a sectional view taken on the line 4 4; of Figure 3, showing the relative positions of the cam members.

2 Referring to the accompanying drawings for a detailed description of my invention, the numeral 1 designates a chase support for the flat chase plate 2 in Figure 1 and the printing segment 3 in Figure 3.

For the purpose of indexing this plate 2 or the segment 3, I provide'the following hand-operated means. Referring to" Figure 1, the numeral 4 designates a bracket which is secured to the' support 1. Journaled in to which there is secured by a pin 6 the upper end'of a depending spring arm 7. To aflat, enlarged portion at the upperend of this aim, there is secured by screws 8, the upper end of a leaf spring 9 whose lower end is free to engage a lug 10 projecting outwardly from the bracket 4. Adjacent the lug 10 on the bracket 4 is another lug 11 which acts as a stop for the arm 7. (See Figure 1.)

Referring to Figures 1, 2 and 3, there "is secured to the shaft 5'by' a pin 12, a lock-up pawl 13. Formed on the front end of the pawl 13 is a boss 14 which is'providedwith a' vertical hole to receive the stem 15 of a pawl tip 16. Th'e'upper end of thest'emi's threaded the upper end of the bracket 4 is a shaft 5 to receive a knurled thumb nut 17 by which the pawl tip is firmly securedto the boss 14. To prevent the pawl tip from turning within the boss, the latter is formed with a slot which receives a pin 18 on said tip. (See Figure 3.)

On the rear end of the pawl 13 there is formed a boss 19 to which there is secured a stud 20. (See Figure 2.) Mounted on the stud 20 is a cam bar 21 that is formed with a slot 22 through which a reduced portion of the stud projects. At its front endthe' cam bar 21 is formed in substantially h'ook shape to provide a tapered surface 23 for engage ment by a shouldered stud 24 secured to a index pawl 25 now to-be'described.

Formed in the rear end of the index pawl 25 is a slot 26 through'which the stud 20 also projects to provide afulcrum for said" pawl. At its front end the pawl 25 terminates in a nose portion 27 adapted to enter any one of the T slots 28 in the chase plate 2 or segment 3.

For the purpose of keeping the index'pawl 25, cam bar 21- and the lock-up pawl l3inline, there is formed on the middle portion of the latter a flange 29 which overhangs both the index pawl 25 and cam bar 21." (See Figures 1 and 4.)

Also formed on the lock-up pawl 13, in 80 front of the flange 29, is an car 30 to which there is secured a shouldered stud31 which bears against the top surface ofthecambar21. (See Figures 1 and 4.)" Thisstu'd 31 is pro'-' vided to' lift the-'lock-u'p pawl 13- from a 85 respective T slot 28 in the chase plate or the segment when the cam bar 21 is moved forward by a han'd lever 32.

The hand lever 32 is secured to one end of a shaft 33 by a pin 34. This shaft '33 is jour- 90 naled in the chase support 1, and to tlieinner end of this shaft there is secured an arm 35 by a pin 36. (See Figure 2.) To thfefree' end ofthe arm 35 the cam bar 21 is'pivotally attached by a shouldered stud 37. The latter 9 is received by a vertical slot 38 in the cam bar, so that the-rear end of the cam bar may bedepressed by the eccentric end 39 of a release lever 40 secured to the "arm 35'by a stud 41. (See Figure 1.) I

forwardly under a stud 44 on the index pawl 25.

as shown in Figure 3, the better to engage the stud.

In operation, when it is desired to index the chase plate 2 or the segment 3, the hand lever 32 is pushed forward. ment of the lever 32 will force the cam bar 21 forwardly. lVhen the hand lever 32 is in its rear position, the lock-up pawl tip 16 is in engagement with one of the T slots 28 in the chase plate or segment to hold it in alinement with the ejector, not shown. At this time the index pawl 25 is held out of engagement with a T slot 28 by the spring 43.

hen the cam bar 21 moves forwardly, its tapered surface. 23 will wedge against the stud 24 on the index pawl 25 to force the latter downwardly to engage its nose 27 with a T slot 28 in the chase plate 2 or the segment 3. When the index pawls nose portion 27, which is formed with a shoulder 45, is in complete engagement with the chase plate or the segment, the further elevation of the cam bar 21 by the stud 24, will raise the lock-up pawl 13 through the engagement of its stud 31 by the top surface of the cam bar until the tip 16 of said lock-up pawl clears the chase plate or the segment. The chase plate 2 or the segment 3 is now free to be indexed to the next slot 28 by the forwardly moving cam bar 21 as follows.

When the stud 24 reaches the straight portion of the cam bar 21, the latter, through the stud, will move the index pawl 25 forwardly to index the chase plate or the segment. And as the pawl 25 moves forwardly, its stud 44 will ride over the hump on the spring 43. This hump on the spring will then hold the stud 44 in its forward position until the lockup pawl tip 16 is again engaged with a T slot 28 to maintain the chase plate or segment in I proper alinement with the ejector. The

pawl tip 16 will so engage a T slot 28 in the chase plate orsegment when the hand lever 32 is drawn rearwardly for the reason that when the cam bar 21 recedes, its tapered surface 23, moving away from the stud 24, will permit the tensioned leaf spring 9 to force the lock-up pawl 13 downwardly. And as the cam bar continues its rearward movement, the spring 43 will elevate the index pawl 25 to raise its nose portion above the T slot 28 which it had previously engaged. The index pawl 25 is then pulled back to its normal position by the engagement of the stud 24 with the back end of the cam bar 21.

If it is desired to raise both pawls 13 and 25 above the chase plate or the segment, it may be done by depressing the release lever The front end of the spring 43 is curved 1 Such a moveverse movement to said cam bar, and an index pawl adapted to be actuated by said cam bar to index said chase plate.

2. In a device of the type described, a support, a chase plate on said support, a cam bar, means for imparting a forward and reverse movement to said cam bar, a lock-up pawl, and means for effecting an engagement of said lock-up pawl with the chase plate after it has been indexed.

3. In a device of the type described, a support, a chase plate on said support, a cam bar, means for supporting said bar for a forward and reverse horizontal movement over said support, a wedge portion on the front end of said bar, an indexing pawl pivoted .I-

for a longitudinal movement over said support, and a projection on the nose end of said index pawl for engagement by the wedge portion of the cam bar when the latter is moved forwardly, for the purpose specified.

4. In a device of the type described, a support, a chase plate on said support, a cam bar, an indexing pawl, a common pivotal support for said cam bar and indexing pawl and permitting a longitudinal movement of each over said support, said cam bar formed with a tapered cam surface at its front end, and a projection on said indexing pawl for engagement by said cam surface for the purpose specified.

5. In a device of the type described, a sup port, a chase plate on said support, a lock-up pawl pivotally secured upon said support, a cam bar pivotally secured to said lock-up pawl for a longitudinal movement, an indexing pawl also secured to said lock-up pawl for a longitudinal movement to index the chase plate, said cam bar formed with a tapering cam surface at its front end, and a projection on the front end of the indexing pawl for engagement by said cam surface for the purpose specified.

6. In a device of the type described, a support, a chase plate on said support, a lock-up pawl pivotally secured upon said support, a spring for urging the lock-up pawl in engagement with the chase plate, an indexing pawl pivotally secured to said lock-u pawl for a longitudinal movement. a cam liar also pivotally secured to said lock-up pawl for longitudinal movement and having a cam connection with the indexing pawl, and a proj ection on the lock-up pawl for engagement by the top surface of the cam bar for the purpose specified. I

7 In a device of the type described, a support, a chase plate on said support, a lock-up pawl pivotally secured upon said support, a spring for urging the lock-up pawl in engagement with the chase plate, an indexing pawl 1 pivotally secured to said lock-up pawl for a longitudinal movement, a cam bar also pivotally secured to said lock-up pawl for longitudinal movement and formed on its front end with a tapered surface, a projection on the indexing pawl for engagement by said surface, and a stud on the lock-up pawl for engagement by the top surface of the cam bar for the purpose specified.

8. In a device of the type described, a support, a chase plate on said support, a bracket secured to the latter, a stud on said bracket, a lock-up pawl mounted on said stud, an arm projecting downwardly from said stud, a leaf springattached to said arm, an abutment on the bracket adapted to be engaged by the spring, a longitudinally movable index pawl carried by said lock-up pawl, and alongitudinally movable cam bar also carried by said lock-up pawl and having a cam connection Evith the indexing pawl for the purpose speci- 9. In a device of the type described, a support, a chase plate on said support, a lock-up pawl pivotally secured upon said support, a stud onsaid lock-up pawl, an indexing pawl formed with a slot through which said stud projects to pivotally support the indexing pawl for longitudinal movement, and a cam bar formed with a longitudinal slot through which said stud also projects to pivotally support said cam bar for a longitudinal movement, said cam bar having a cam connection with the indexing pawl for the purpose specified.

10. In a device of the type described, a support, a chase plate on said support, a lock-up pawl pivotally secured upon said support, an indexing pawl and a cam bar carried by the lock-up pawl, and a flange on the lock-up pawl projecting over the indexing pawl and cam bar for the purpose specified.

In testimony whereof I have hereunto set my hand this 12th day of October, 1928.

FRANK H. POEPPELMEIER. 

